Air King AK80 Energy Star Quiet Series Bath Fan, 80-CFM Exhaust fan grill's highest projection point is 1/2" down from ceiling and measures 11" wide x 13.75" deep; housing measures 10-7/8" length x 9-3/8" wide x 7-7/8" deep Operates at 80 CFM at 1.5 sones, and easily installs with adjustable hanging brackets for 16" centers Electronically balanced centrifugal blower wheel provides top-notch ventilation with reduced sound Fan is made for continuous operation and can satisfy the needs of an 80 sq. ft. bathroom Comes with a 4" round connector with spring-loaded metal damper, offering superior protection against back drafts Energy Star high performance bath fan with low sound levels and a contoured grill 80-CFM blower at 1.5-sone for quiet operation Exhaust capacity for rooms of approximately 80-square feet Easily install by using the included adjustable hanging brackets Comes with a 5-year limited warranty